[ 23.792557] BUG: Bad rss-counter state mm:00000000d63949ac type:MM_FILEPAGES val:33 [ 23.793884] BUG: Bad rss-counter state mm:00000000d63949ac type:MM_ANONPAGES val:22 [ 23.954103] ================================================================== [ 23.955203] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.956363] Read of size 8 at addr ffff88800db08228 by task sshd/219 [ 23.957293] [ 23.957515] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.958391] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.959382] Call Trace: [ 23.959704] [ 23.960000] dump_stack_lvl+0x91/0xf0 [ 23.960507] print_report+0xcc/0x620 [ 23.961000] ? __virt_addr_valid+0x102/0x340 [ 23.961565] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.962192] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.962811] kasan_report+0xbe/0xf0 [ 23.963294] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.963923] vma_interval_tree_remove+0xc75/0xec0 [ 23.964538] vma_prepare+0xc54/0x11a0 [ 23.965022] __split_vma+0x5af/0x950 [ 23.965500] ? __pfx___split_vma+0x10/0x10 [ 23.966040] ? find_held_lock+0x2c/0x110 [ 23.966571] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.967151] ? lock_is_held_type+0x9f/0x120 [ 23.967694] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.968341] ? mtree_range_walk+0x632/0x900 [ 23.968904] ? mas_walk+0x5c7/0x7c0 [ 23.969389] do_vmi_munmap+0x1f1/0x2b0 [ 23.969895] mmap_region+0x1f9/0x2660 [ 23.970395] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.970910] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.971651] ? __pfx_lock_acquire+0x10/0x10 [ 23.972191] ? __pfx_mmap_region+0x10/0x10 [ 23.972743] ? security_mmap_addr+0x7d/0xa0 [ 23.973288] ? get_unmapped_area+0x1f5/0x3f0 [ 23.973851] do_mmap+0x854/0xf00 [ 23.974301] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.974804] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 23.975381] ksys_mmap_pgoff+0x3af/0x500 [ 23.975894] do_syscall_64+0x3f/0x90 [ 23.976402] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.977050] RIP: 0033:0x7f3a703e7d82 [ 23.977503] Code: eb aa 66 0f 1f 44 00 00 41 f7 c1 ff 0f 00 00 75 27 55 48 89 fd 53 89 cb 48 85 ff 74 33 41 89 da 48 89 ef b8 09 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 56 5b 5d c3 0f 1f 00 c7 05 ae 03 01 00 16 00 [ 23.979685] RSP: 002b:00007ffde4907308 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 23.980615] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3a703e7d82 [ 23.981471] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3a6f821000 [ 23.982349] RBP: 00007f3a6f821000 R08: 0000000000000009 R09: 0000000000001000 [ 23.983208] R10: 0000000000000812 R11: 0000000000000206 R12: 00005635178bdec0 [ 23.984077] R13: 00007ffde4907320 R14: 00007ffde4907350 R15: 00007ffde49076b0 [ 23.984969] [ 23.985264] [ 23.985488] Allocated by task 212: [ 23.985930] kasan_save_stack+0x22/0x50 [ 23.986445] kasan_set_track+0x25/0x30 [ 23.986959] __kasan_slab_alloc+0x59/0x70 [ 23.987488] kmem_cache_alloc+0x16b/0x370 [ 23.988021] vm_area_dup+0x20/0x160 [ 23.988502] __split_vma+0x170/0x950 [ 23.988981] split_vma+0xc6/0x110 [ 23.989419] mprotect_fixup+0x8d2/0xb30 [ 23.989925] do_mprotect_pkey+0x87e/0xd40 [ 23.990448] __x64_sys_mprotect+0x78/0xc0 [ 23.990970] do_syscall_64+0x3f/0x90 [ 23.991450] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.992092] [ 23.992320] Freed by task 13: [ 23.992704] kasan_save_stack+0x22/0x50 [ 23.993211] kasan_set_track+0x25/0x30 [ 23.993697] kasan_save_free_info+0x2b/0x50 [ 23.994228] __kasan_slab_free+0x10a/0x190 [ 23.994770] kmem_cache_free+0x10d/0x4d0 [ 23.995321] rcu_core+0x8c8/0x2860 [ 23.995762] __do_softirq+0x1b7/0x7d4 [ 23.996259] [ 23.996486] Last potentially related work creation: [ 23.997085] kasan_save_stack+0x22/0x50 [ 23.997688] __kasan_record_aux_stack+0x8e/0xa0 [ 23.998266] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.998906] remove_vma+0x139/0x170 [ 23.999356] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.999918] do_vmi_munmap+0x1f1/0x2b0 [ 24.000428] __vm_munmap+0x138/0x3a0 [ 24.000896] __x64_sys_munmap+0x59/0x80 [ 24.001391] do_syscall_64+0x3f/0x90 [ 24.001866] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.002516] [ 24.002729] Second to last potentially related work creation: [ 24.003409] kasan_save_stack+0x22/0x50 [ 24.003916] __kasan_record_aux_stack+0x8e/0xa0 [ 24.004499] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.005145] remove_vma+0x139/0x170 [ 24.005604] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.006170] do_vmi_munmap+0x1f1/0x2b0 [ 24.006654] mmap_region+0x1f9/0x2660 [ 24.007130] do_mmap+0x854/0xf00 [ 24.007566] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.008055] ksys_mmap_pgoff+0x3af/0x500 [ 24.008568] do_syscall_64+0x3f/0x90 [ 24.009049] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.009690] [ 24.009906] The buggy address belongs to the object at ffff88800db081d0 [ 24.009906] which belongs to the cache vm_area_struct of size 168 [ 24.011383] The buggy address is located 88 bytes inside of [ 24.011383] freed 168-byte region [ffff88800db081d0, ffff88800db08278) [ 24.012807] [ 24.013029] The buggy address belongs to the physical page: [ 24.013691] page:000000005406a075 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdb08 [ 24.014786] memcg:ffff88800970d401 [ 24.015212] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 24.015924] page_type: 0xffffffff() [ 24.016383] raw: 0100000000000200 ffff8880087a0c80 ffffea000034fc40 dead000000000005 [ 24.017295] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800970d401 [ 24.018206] page dumped because: kasan: bad access detected [ 24.018880] [ 24.019095] Memory state around the buggy address: [ 24.019674] ffff88800db08100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.020551] ffff88800db08180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 24.021406] >ffff88800db08200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 24.022269] ^ [ 24.022827] ffff88800db08280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 24.023681] ffff88800db08300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 24.024554] ================================================================== [ 24.025490] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.686135] BUG: Bad rss-counter state mm:000000001956898d type:MM_FILEPAGES val:33 [ 26.687254] BUG: Bad rss-counter state mm:000000001956898d type:MM_ANONPAGES val:22 [ 27.155440] BUG: Bad rss-counter state mm:0000000031b68051 type:MM_FILEPAGES val:33 [ 27.156521] BUG: Bad rss-counter state mm:0000000031b68051 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:18475' (ECDSA) to the list of known hosts. 2023/06/20 14:33:51 fuzzer started 2023/06/20 14:33:51 dialing manager at localhost:36067 2023/06/20 14:33:51 checking machine... 2023/06/20 14:33:51 checking revisions... [ 27.955175] kmemleak: Automatic memory scanning thread ended 2023/06/20 14:33:51 testing simple program... [ 28.000996] cgroup: Unknown subsys name 'net' [ 28.054429] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:33:51 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=ffffffff815342db RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=ffffffff81830828 RSP=ffff88800d04fc78 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffff88806ce361c8 R13=ffffffff87b6a200 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8180fea8 RFL=00000056 [---ZAP-] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f97252be900 00000000 00000000 GS =0000 ffff88806ce00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe0000003000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000001000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007f9725875618 CR3=000000000ea5a000 CR4=00350ef0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=563412feff00545000000000000080fe XMM01=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 0000000000000000 00000000 00000000 GS =0000 ffff88806cf00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe000004a000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000048000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007fef1d1e5a40 CR3=0000000013a4e000 CR4=00350ee0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=00000000000000000000000000000000 XMM01=2cc057b62d0b29928c40785c67b5a536 XMM02=000000000011a090eff9b2d0a8fce9cb XMM03=000000000011a1602c67c8bc2e329bc3 XMM04=e79c3301a986958900000000000ae988 XMM05=dfcdbad4f1609c3700000000001320b0 XMM06=dd0f4c436a2932620000000000130b20 XMM07=e042d86d42eb936e0000000000121260 XMM08=970e65b9d3dfe956000000000011a160 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000